基于分层壳单元的钢筋混凝土板面外冲切模拟研究

NUMERICAL STUDY ON OUT-OF-PLANE PUNCHING OF REINFORCED CONCRETE SLAB UPON LAYERED SHELL MODEL

  • 摘要: 分层壳模型是实现结构精细化高效模拟的强有力工具。面外冲切效应是传统分层壳模型唯一无法模拟的受力状态。为了进一步对冲切的全受力过程进行研究,该文基于传统的分层壳单元,在已有试验的基础上对面外的非线性本构进行了定义,并根据冲切试验数据库标定了面外本构的参数,通过二次开发实现了冲切现象的模拟,分析了混凝土强度、抗冲切钢筋等对冲切破坏形态以及冲切承载力的影响规律,形成了可以模拟冲切效应的新型分层壳单元,并通过冲切数据库对考虑面外冲切效应的分层壳单元的模拟效果进行验证。

     

    Abstract: The layered shell model is a potent tool for the precise and efficient simulation of structures. Its out-of-plane punching effect remains the only loading condition that traditional layered shell models are incapable of simulating. To further investigate the complete force-bearing process of punching, this study, based on the traditional layered shell element, defines the nonlinear out-of-plane constitutive behavior on the basis of existing experimental data. The parameters of the out-of-plane constitutive behavior are calibrated according to a punching test database, enabling the simulation of punching phenomena through secondary development. The study analyzes the influence patterns of concrete strength and anti-punching reinforcements on the punching failure modes and punching bearing capacity, resulting in the formation of a novel layered shell element capable of simulating the out-of-plane punching effect. The simulation efficacy of the layered shell element considering the out-of-plane punching effect is validated through a punching database.

     

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